| 濒危植物疏花水柏枝种子萌发的生态学特性 |
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| 引用本文： | 袁万群,詹海燕,陈芳清,夏洪伟,罗友成,刘长春. 濒危植物疏花水柏枝种子萌发的生态学特性[J]. 生态环境, 2008, 17(6) |
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| 作者姓名： | 袁万群 詹海燕 陈芳清 夏洪伟 罗友成 刘长春 |
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| 作者单位： | 三峡大学生态与环境科学研究中心,湖北,宜昌,443002 |
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| 基金项目： | 国家科技支撑计划课题项目 |
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| 摘 要： | 疏花水柏枝Myricaria laxiflora分布于我国三峡从宜昌至重庆段长江干流的消落带,分布区十分狭小.三峡工程兴建后,疏花水柏枝将失去绝大部分的生境而成为濒危物种.通过设置一系列控制实验测试了土壤水质量分数,温度和土壤类型对疏花水柏枝种子萌发的生态学的影响.实验结果表明,土壤水质量分数、温度和土壤类型对种子萌发率都有显著影响.其中种子萌发率随土壤水质量分数增加而增大,土壤水质量分数达到饱和程度时萌发率达到最大值;高温条件下的种子萌发率高于低温,种子萌发率在21～27℃达到最大值;种子在河沙基质上萌发好于在沙土基质上.结合分布区萌发季节的环境条件分析,土壤水质量分数是限制该物种分布于消落带的关键作用因子.据此就该物种的种群保护与重建提出了一些建议.
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| 关 键 词： | 疏花水柏枝 地理分布 消落带 三峡地区 种子萌发率 |
Ecological characteristics of seed germination of an endangered species Myricaria laxiflora |
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| Yuan Wanqun,Zhan Haiyan,Chen Fangqin,Xia Hongwei,Luo Youcheng,Liu Changchun. Ecological characteristics of seed germination of an endangered species Myricaria laxiflora[J]. Ecology and Environmnet, 2008, 17(6) |
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| Authors: | Yuan Wanqun Zhan Haiyan Chen Fangqin Xia Hongwei Luo Youcheng Liu Changchun |
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| Affiliation: | Yuan Wanqun,Zhan Haiyan,Chen Fangqin,Xia Hongwei,Luo Youcheng,Liu Changchun Center for Ecology , Environmental Science,China Three Gorges University,Yichang 443002,China |
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| Abstract: | Myricaria laxiflora is restricted within the water-level fluctuation zone along Yangtze River from Yichang to Chongqing and has a narrow distribution area. The species will lose most of habitats and become an endangered species when the Three Gorges project is finished and water level is raised. To understand its natural geographic distribution and provide information for population conservation, we designed a control experiment to study its ecological characteristics of seed germination. Results showed tha... |
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| Keywords: | Myricaria laxiflora geographical distribution water-level fluctuation zone the Three Gorges area rate of seed germi- nation |
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